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Analog Devices Inc./Maxim Integrated DS1065T-80
- Part No.:
- DS1065T-80
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
DS1065T-80.pdf
- Description:
- ECONOSCILLATOR/DIV 80MHZ TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,518
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Product details
Overview
DS1065T-80 from Dallas Semiconductor (now Analog Devices) is a user-programmable fixed-frequency oscillator with on-chip prescaler and divider, delivering 80.000 MHz output from a single 5V supply in TO-92 package. It features 0.5% initial frequency tolerance, ±3% variation over temperature and voltage, and dual-mode I/O pin for programming via 1-Wire protocol.
For engineers reviewing the DS1065T-80 datasheet, DS1065T-80 pinout, DS1065T-80 application, or DS1065T-80 equivalent, key selection criteria include programmable divider range (2–513), prescaler options (÷1, ÷2, ÷4), nonvolatile EEPROM register storage, 100 ps typical jitter, and TO-92 footprint compatibility for space-constrained clock generation.
Technical Context
The DS1065T-80 integrates a master internal oscillator followed by a user-selectable prescaler (÷1, ÷2, or ÷4) and a 9-bit programmable divider (N = 2 to 513). Frequency configuration is stored in on-chip EEPROM and restored automatically on power-up in operation mode.
Its dual-function IN/OUT pin supports serial programming via 1-Wire protocol when pulled high at power-on using a ~5 kΩ resistor; otherwise, it functions as a CMOS-compatible oscillator output with VOH ≥ 2.4 V (IOH = −4 mA) and VOL ≤ 0.4 V (IOL = 4 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 80.000 MHz - factory-configured maximum operating frequency for DS1065T-80 variant |
| Initial Tolerance | ±0.5% at TA = 25°C, VCC = 5V - ensures tight timing margin without external calibration |
| Temp/Voltage Variation | ±3% - defines worst-case frequency deviation across 0°C to 70°C and VCC = 4.75–5.25 V |
| Supply Voltage | 4.75 V to 5.25 V - compatible with standard 5V logic rails and tolerant of ±5% regulation |
| Jitter | 100 ps typical - supports stable clocking for medium-speed digital interfaces (e.g., parallel buses, legacy microcontrollers) |
| Power-Up Time | 0.1–1 ms - includes POR, oscillator stabilization (~1024 INTOSC cycles), and register load from EEPROM |
| Load Capacitance | 15 pF - specifies standard capacitive loading condition for AC specs; higher CL reduces max frequency and VOH |
Pinout & Package
DS1065T-80 is housed in a 3-lead TO-92 plastic package with bottom-view pinout: Pin 1 = I/O (bidirectional serial programming input / oscillator output), Pin 2 = VCC (5V supply), Pin 3 = GND (circuit ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I/O) | Serial data interface / oscillator output | Functions as IN during 1-Wire programming (pullup required); becomes CMOS output after reset in operation mode |
| 2 (VCC) | Positive supply rail | Accepts 4.75–5.25 V; powers internal oscillator, prescaler, divider, and EEPROM controller |
| 3 (GND) | Reference ground | Return path for all internal circuitry; must be low-impedance to minimize jitter and supply noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| User-programmable divider (2–513) | Enables precise frequency synthesis from same base oscillator without external components or layout changes |
| On-chip prescaler (÷1, ÷2, ÷4) | Extends effective frequency range while maintaining low-jitter internal reference; selectable via MUX register |
| Nonvolatile EEPROM registers | Preserves programmed M and N values across power cycles; eliminates need for external configuration memory |
| Dual-mode I/O pin | Reduces pin count and board area vs. dedicated programming interface; requires only one pullup resistor for setup |
| No external components required | Eliminates external crystal, load caps, or feedback resistors-reduces BOM cost and layout complexity |
Applications
| Industrial PLC Timing | Legacy Microcontroller Clock |
|---|---|
Use Scenario: Synchronizing scan cycles and I/O update intervals in compact programmable logic controllers. IC Role / Device Role / Timing Role: Primary system clock source generating stable 80 MHz reference for CPU and peripheral timing blocks. Use Value: ±3% total variation ensures deterministic cycle timing across industrial temperature range without recalibration. | Use Scenario: Providing clock input to 8/16-bit microcontrollers (e.g., Intel 80C51, Motorola 68HC11) in cost-sensitive embedded designs. IC Role / Device Role / Timing Role: Fixed-frequency oscillator replacing quartz crystals + load capacitors to reduce component count. Use Value: TO-92 package and no external components lower PCB area and assembly cost versus discrete crystal solutions. |
| Test Equipment Reference | Communications Baseband Clock |
Use Scenario: Serving as stable timebase for digital pattern generators and logic analyzers requiring repeatable edge placement. IC Role / Device Role / Timing Role: Low-jitter (100 ps typ.) clock generator feeding FPGA-based sampling logic and trigger sequencers. Use Value: 100 ps jitter enables sub-nanosecond timing resolution in deterministic test waveform generation. | Use Scenario: Driving baseband processing ICs (e.g., ADC/DAC controllers, FIR filter engines) in analog front-end modules. IC Role / Device Role / Timing Role: Programmable clock source allowing frequency adjustment via firmware to match varying data rate requirements. Use Value: On-the-fly reprogramming (via 1-Wire) supports multiple data rates without hardware change or inventory duplication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1065-80 | Same die, identical electrical specs; differs only in packaging (TO-92 vs. DS1065T-80's TO-92 variant with tape-and-reel marking) | No functional difference; both support full 1-Wire programming and same frequency range | Select DS1065T-80 for automated SMT assembly; DS1065-80 for manual prototyping or through-hole use |
| Si514-A-GM | IC-based I2C-programmable XO (not oscillator+divider); 100 MHz max, ±10 ppm stability, integrated PLL | Higher precision and stability but requires I2C bus, external power filtering, and layout attention for phase noise | Choose Si514-A-GM when sub-ppm stability or multi-frequency agility is required; DS1065T-80 suits simpler, lower-cost, no-bus designs |
Compared with DS1065-80 and Si514-A-GM, the DS1065T-80 offers identical core functionality to DS1065-80 in optimized packaging for volume production, while differing fundamentally from Si514-A-GM in architecture (divider-based vs. PLL-based), interface (1-Wire vs. I2C), and stability grade (±3% vs. ±10 ppm), making it suitable for cost-driven, moderate-precision clocking where minimal external components are critical.
Availability
DS1065T-80 is available at Aetrix Electronics and suitable for industrial PLC timing, legacy microcontroller clocking, test equipment reference, and communications baseband clocking requiring stable component supply and long-term obsolescence management.
Supply support for DS1065T-80 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Dallas Semiconductor, now part of Analog Devices, designs precision timing, data communication, and mixed-signal ICs for industrial, computing, and embedded systems.
The DS1065 product line delivers programmable fixed-frequency oscillators targeting applications needing field-configurable clocks without external components or complex interfaces.
FAQ
What is the factory default output frequency of DS1065T-80?
The DS1065T-80 ships configured for half its maximum operating frequency, i.e., 40.000 MHz, per Dallas Semiconductor documentation. This default setting uses DIV = 000000000 (divider = 2) and MUX = 00110100 (MSEL = 1, DIV1 = 0), resulting in internal oscillator divided by 2. Users must reprogram the device via 1-Wire to achieve the rated 80.000 MHz output.
Can DS1065T-80 operate from a 3.3V supply?
No, DS1065T-80 is specified only for 4.75 V to 5.25 V operation per its DC electrical characteristics. Attempting 3.3V operation violates absolute maximum ratings and will result in failure to start, unstable oscillation, or undefined register behavior. For 3.3V systems, consider alternatives like the Si514 series or dedicated low-voltage XO solutions.
How is programming mode entered on DS1065T-80?
DS1065T-80 enters programming mode when a ~5 kΩ pullup resistor connects Pin 1 (I/O) to VCC before power application. This pulls the pin above VIH (≥2.0 V) at power-on, triggering internal release after tSTAB and enabling 1-Wire communication. For normal operation, any external pullup must exceed 20 kΩ to keep the pin below VIH during startup.
What is the maximum load capacitance supported by DS1065T-80?
DS1065T-80 is characterized for 15 pF load capacitance per its AC specifications. Operating with higher CL may reduce output voltage swing and limit maximum achievable frequency. The datasheet explicitly warns that higher capacitance loads can degrade VOH and restrict fO - design verification at target CL is required if exceeding 15 pF.
Does DS1065T-80 support in-system reprogramming after soldering?
Yes, DS1065T-80 supports full in-system reprogramming via its 1-Wire interface after PCB assembly. The bidirectional I/O pin allows serial write/read access to DIV and MUX registers using standard 1-Wire timing, enabling field updates to frequency or mode without removing the device. No special voltage or sequencing is needed beyond the initial pullup condition at power-on.
DS1065T-80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- -
- Type:
- -
- PLL:
- -
- Input:
- -
- Output:
- -
- Number of Circuits:
- -
- Ratio - Input:Output:
- -
- Differential - Input:Output:
- -
- Frequency - Max:
- -
- Divider/Multiplier:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
DS1065T-80 FAQ
1.How can I place an order for DS1065T-80 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1065T-80 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1065T-80 reliable?
The price and inventory of DS1065T-80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1065T-80 is usually 5 days.
3.What payment methods are accepted for DS1065T-80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1065T-80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1065T-80?
DS1065T-80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1065T-80 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1065T-80?
For technical support, including DS1065T-80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1065T-80 requirements.
6.How does Aetrix verify that DS1065T-80 is sourced from the original manufacturer or authorized distributors?
All DS1065T-80 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1065T-80 meets industry standards.
7.What is the process for return or replacement of DS1065T-80?
All DS1065T-80 units undergo pre-shipment inspection (PSI). If there is an issue with DS1065T-80, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1065T-80 part is unused and in its original packaging.
Return procedure for DS1065T-80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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